Electricity: motive power systems – Positional servo systems – Digital or numerical systems
Patent
1978-11-01
1982-10-05
Dobeck, B.
Electricity: motive power systems
Positional servo systems
Digital or numerical systems
318603, 318618, G05B 1928
Patent
active
043530206
ABSTRACT:
A positioning control servo uses a digital feedback control system and an analog feedback control system, both simultaneously generating control signals to a servo summing node. The digital system derives negative feedback from velocity values which are raised to any programmed exponential value according to a linear velocity profile. The analog system feedback signals provide a non-linear velocity profile and fine position adjustment and dominates control at the servo end of travel. Interface control is provided from multiplexing a single digital feedback control system with a plurality of servo systems. The interface control selects a unique velocity profile in a digital system for each particular servo system. No switching is required between the digital and analog systems because both have continuous input to the servo summing node.
REFERENCES:
patent: 2932471 (1960-04-01), Exner et al.
patent: 3248622 (1966-04-01), Kelling
patent: 3458785 (1969-07-01), Sordello
patent: 3559018 (1971-01-01), Fournier
patent: 3737751 (1973-06-01), Lima
patent: 4066941 (1978-01-01), Foster
patent: 4226546 (1980-10-01), Hoffman
Electric Motor Control Techniques, by Irving Gottlieb, pp. 132, 129, (1976), Thomas W. Sams publication.
Dobeck B.
Plessey Peripheral Systems
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